Android app updated and now it won't accept my password, does not give me a password error, just refreshes back to the login page over and over. Using a Samsung S8+

This was suggested by someone with this problem over on FastMail's twitter:

I had the same thing, always bringing me back to the login screen even with the correct password, I had to clear the application's data from the Android settings to make it work again. Hope that helps.

This was suggested from someone with this problem by someone over on FastMail's twitter:

I had the same thing, always bringing me back to the login screen even with the correct password, I had to clear the application's data from the Android settings to make it work again. Hope that helps.

Had this with a previous update of the app. Delete app and reinstall will help.
I think this is something like clearing the cache.

So far, it seems the updated app is like, er mud off a shovel, whereas before it was unusably slow. I'm returning to it having had to forward everything to a Gmail account (complicated reasons to do with my MX records why I couldn't just use the Gmail app to access FM on the app).